re1 - Methods for Drawing Carbs Rotation of Fischer...

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Unformatted text preview: Methods for Drawing Carbs Rotation of Fischer projection: Watch video on Vista. Very reliable method, but can be time consuming Template method: Use glucose as a template for solving unknown sugars This can be very fast, but only applicable to aldoses , both pyranose and furanose O HO HO OH OH OH CHO OH H H HO OH H OH H CH 2 OH O HO HO OH OH H OH CHO OH H H HO OH H OH H CH 2 OH alpha-pyranose beta-pyranose isomers of D-glucose Template Method O HO HO OH OH OH CHO OH H H HO OH H OH H CH 2 OH D-glucose CHO OH H OH H OH H OH H CH 2 OH O HO OH OH OH OH D-allose Template Method beta-pyranose beta-glucose CHO OH H OH H OH H OH H CH 2 OH beta-pyranose beta-allose CHO OH H H HO OH H OH H CH 2 OH beta-furanose CHO OH H OH H OH H OH H CH 2 OH CHO OH H H HO OH H OH H CH 2 OH H OH H H OH H O HO OH H OH H OH H OH OH H O HO OH H H O HO HO OH OH OH O HO OH OH OH OH Template Method Fischer Projection Rotation CHO OH H H HO OH H OH H CH 2 OH Fischer Projection Rotation CHO OH H H HO OH H OH H CH 2 OH O HO HO OH OH OH CHO OH H H HO OH H OH H CH 2 OH H OH H H OH HO H O H HO HO beta-glucose Practice Final exam B 6a O HO HO OH OH OH CHO OH H H HO OH H OH H CH 2 OH H OH H H OH HO H O H HO HO beta-glucose Practice Final exam B 6a Practice Final exam B 6a Practice Final exam B 6a Practice Final exam B 6c) O HO HO OH OH OH CHO OH H H HO OH H OH H CH 2 OH beta-glucose Carb. Problems 1 Practice Final exam A 7a Practice Final exam A 7a Carb. Problems 10c Practice Final exam B Part 2 N O Practice Final exam C 2 Less electrophilic carboxylic acid derivatives tend to have less acidic alpha hydrogens ( higher pKa values ). This relates to the carbonyl carbon having less partial positive charge, causing the alpha hydrogens to be less acidic, as the carbonyl carbon can be viewed as a worse electron withdrawing group . The argument in Bruice about competitve conjugation is acceptable as well. Practice Final exam C Part 2 Practice Final exam C Part 2...
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re1 - Methods for Drawing Carbs Rotation of Fischer...

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